Here is the item again:

As all of her classmates were sharing results (A) Melody quietly left the room (B) and found a quiet corner in the hallway (C) so that she could see her grade without embarrassing herself in front of her friends.

You correctly realized that a comma after results was needed. To fix the problem, you chose to do this:

As all of her classmates were sharing results, Melody quietly left the room and found a quiet corner in the hallway so that she could see her grade without embarrassing herself in front of her friends.

As all of her classmates were sharing results is a subordinate clause. You have correctly employed Punctuation Rule 2:

Subordinate Clause + , + Main Clause.

Excellent choice!

Go to the next sentence.

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